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| - Structured Query Language
- Είναι μία Προγραμματιστική Γλώσσα.
- SQL is the dominant query language for database access. This is a fourth generation language that can be used to dynamically query data and display the data that was retrieved. SQL standards were first developed and published in 1986. The SQL standard has been modified several times since then. These standards have been approved by both the ISO and ANSI organizations. Even though these two organizations back the standards, there are many commercial implementations of SQL. While syntax will change across each product, the basic structure remains the same.
- SQL (Structured Query Language) 은 IBM에서 도입한 관계형 데이터베이스 관리 시스템을 위해 설계된 프로그래밍 언어입니다.
- SQL (англ. Structured Query Language — язык структурированных запросов) — универсальный язык, применяемый для создания, модификации и управления данными в реляционных базах данных. SQL основывается на реляционной алгебре. Язык SQL делится на три части:
* операторы определения данных (Data Definition Language, DDL)
* операторы манипуляции данными (Data Manipulation Language, DML)
* операторы определения доступа к данным (Data Control Language, DCL)
- Since TOTAL-PAY formula relies on using the total HOURS-WORKED rather than the last detail records value of HOURS-WORKED; CALC must be specified as the Column Calculation for TOTAL-PAY.
- SQL (Structured Query Language) is a language used for querying databases. It is an imperative language composed by instructions which include clauses and expressions. There are some SQL sub-languages:
* DML (Data Manipulation Language) is a language to insert, delete and modify data;
* DDL (Data Definition Language) is a language to create, delete and modify data structures (database objects);
* DCL (Data Control Language) is a language to control the privileges for data access;
* DTL (Data Transaction Language) is a language to manage transactions (operations which include more instructions none of which can be executed if one of them fails).
- SQL originally stood for Structured Query Language, until the world's finest computer scientists ruled that it wasn't structured, and any queries one might make with it would probably be rejected as mal-formed with a minimum of explanation. As for its status as a language: it is often described as a "declarative language" (4GL) — that is, a language where the programmer, removing his finger from his nose to fidget with his face-piercings, simply states the result he wants to achieve and never has to indicate how it might come about — but it winds up working as poorly as your 4GL cellphone lets you actually make out what your caller is saying.
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| - SQL-86, SQL-89, SQL-92, SQL:1999, SQL:2003, SQL:2008
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| - Structured Query Language
- Είναι μία Προγραμματιστική Γλώσσα.
- SQL (Structured Query Language) is a language used for querying databases. It is an imperative language composed by instructions which include clauses and expressions. There are some SQL sub-languages:
* DML (Data Manipulation Language) is a language to insert, delete and modify data;
* DDL (Data Definition Language) is a language to create, delete and modify data structures (database objects);
* DCL (Data Control Language) is a language to control the privileges for data access;
* DTL (Data Transaction Language) is a language to manage transactions (operations which include more instructions none of which can be executed if one of them fails). Most implement their own dialect of the language with their own proprietary language extensions. Some standards exist, though:
* SQL86 - First ANSI standard;
* SQL89 - Minor update, by ANSI;
* SQL92 (also called SQL2) - Major update, by ISO;
* SQL:1999 (also called SQL3) - Includes some advanced database objects, which contain database's logic.
* SQL:2003 - Adds XML, sequences and other features.
* SQL:2006 - Advanced XML, X-Query, etc.
* SQL:2008 - Formalized some old proprietary SQL extensions.
- SQL is the dominant query language for database access. This is a fourth generation language that can be used to dynamically query data and display the data that was retrieved. SQL standards were first developed and published in 1986. The SQL standard has been modified several times since then. These standards have been approved by both the ISO and ANSI organizations. Even though these two organizations back the standards, there are many commercial implementations of SQL. While syntax will change across each product, the basic structure remains the same.
- SQL (Structured Query Language) 은 IBM에서 도입한 관계형 데이터베이스 관리 시스템을 위해 설계된 프로그래밍 언어입니다.
- SQL originally stood for Structured Query Language, until the world's finest computer scientists ruled that it wasn't structured, and any queries one might make with it would probably be rejected as mal-formed with a minimum of explanation. As for its status as a language: it is often described as a "declarative language" (4GL) — that is, a language where the programmer, removing his finger from his nose to fidget with his face-piercings, simply states the result he wants to achieve and never has to indicate how it might come about — but it winds up working as poorly as your 4GL cellphone lets you actually make out what your caller is saying. Informix and Teradata claim that their SQL stands instead for Stored Query Language. This acknowledges that there is nothing terribly "structured" about SQL, although things you create with it, you might be able to "store" — and even find at a later date, provided you don't use SQL. In 1986, SQL became a standard of the American National Standards Institute (ANSI). The next year, it went on a global tour, fronting for an unknown act called HTML at the International Organization for Standardization (ISO). Each of these standards purports to define SQL exactly, and it remains astonishing that at no time in the following three decades could one write anything in SQL fancier than "Hello, World!" that would run on all SQL servers.
- SQL (англ. Structured Query Language — язык структурированных запросов) — универсальный язык, применяемый для создания, модификации и управления данными в реляционных базах данных. SQL основывается на реляционной алгебре. Язык SQL делится на три части:
* операторы определения данных (Data Definition Language, DDL)
* операторы манипуляции данными (Data Manipulation Language, DML)
* операторы определения доступа к данным (Data Control Language, DCL)
- Since TOTAL-PAY formula relies on using the total HOURS-WORKED rather than the last detail records value of HOURS-WORKED; CALC must be specified as the Column Calculation for TOTAL-PAY.
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